Fatfish Biggie 20AH Fat Tyre E-Bike

$2,999.00 Sale Save
Colour Army Green

Item is in stock Only 0 left in stock Item is out of stock Item is unavailable

Disclaimer: Fatfish Ebikes' products are designed for recreational use. Laws and regulations for their use vary across Australian states and territories. It’s the rider’s responsibility to stay informed about local rules, ride safely, and wear appropriate protective gear, including a helmet. Any guidance or information provided by Fatfish Ebikes is general in nature and may not apply to every individual situation.

Meet the Fatfish Biggie, the ultimate ride for those who want power, style, and endurance in one beast of an e-bike. Whether you’re tearing up the streets or cruising to your next adventure, the Biggie’s got your back with top-tier components and serious performance.

Power-Packed Performance— Rocking a Fatfish 48V 500W High Torque Rear Motor, which can be unlocked to 750W and delivers a peak output of 1080W.

Massive Range—A 960Wh Samsung-cell battery gives you up to 200 km in Eco Mode, so your ride lasts longer than your playlist. Plus, it’s built with superior weatherproofing and comes with a safety strap for your battery.

Shimano 7-Speed Precision—The Shimano Tourney derailleur & 14-28T cassette ensure crisp, reliable shifting so you can handle any terrain like a pro.

Next-Level Stopping Power—Kamros hydraulic disc brakes with motor cut-off mean you’re always in control, no matter the conditions.

Smooth Suspension—A 60mm front fork with adjustable lockout soaks up bumps for a cushy ride.

Tough & Ready—Built on a lightweight yet sturdy aluminium alloy frame, featuring marine-rated cables for easy servicing.

Commuter & Adventure-Ready—Puncture-resistant 20” x 4.0” tyres on one-piece alloy rims give you the perfect mix of grip and durability.

Smart Display & Controls— The centre-mounted C900 LCD shows speed, trip info, battery life, and more. The built-in horn, turn signals, and USB charging make it city-proof.

Cargo-Friendly— A MIK-ready reinforced rear rack lets you slide cargo on and off effortlessly.

Max Load? No worries. – Carry up to 160 kg, including gear, groceries, or whatever else you need.

With a 3-year frame warranty, 2 years on battery and motor, and 1 year on all other components, the Biggie isn’t just an e-bike—it’s an investment in next-level riding.

Time to roll in style. Jump on a Biggie and make every ride legendary.

Shipping Information

All orders are dispatched within 3–5 business days from Gold Coast, this is followed by a delivery time frame. Delivery times typically range from 3–5 business days for metro areas and 7–14 business days for rural and remote locations. Excludes WA, NT and remote areas. For Standard Shipping, we offer free delivery on orders over $99, excluding bulky items. Orders under $99 will incur a $9.90 flat shipping fee.

Please note: While every attempt will be made for you to receive your order as per these delivery timeframes, occasional inconsistencies in logistics and stockouts may occur.

We also offer a Click & Collect service, allowing you to order online and conveniently pick up your items in-store at no extra cost. Make sure to collect your order within 7 days from when you're notified that your order is ready.

Please note: While every attempt will be made for your order to be processed as per the delivery timeframes stated, occasional inconsistencies in logistics and stock outs may occur.

For products available for pre-order, please check the ETA provided for stock availability.

The ETA indicates when stock will be ready, not the delivery date. Once stock is available, your order will be processed, and standard shipping times will apply.

$14.00 Express Shipping option is available for non-bulky items, usually arriving next business day in metro areas. Express shipping is not available for e-bikes and for delivery to WA, NT and remote areas.

Please note: While every attempt will be made for you to receive your order as per these delivery timeframes, occasional inconsistencies in logistics and stockouts may occur



The Biggie- Bigger, Better & Badass

rider posing on fatfish biggie fat tyre ebike in a skate park

We made B.I.G upgrades to make the Fatfish OG bolder, and brought you the Biggie.


"Sicker than your average..."-Biggie



rear rack of the fatfish bigge with the pavement in the background
C900 display attached to the fatfish biggie frame

Bigger Frame

+ Better Features

= Badass Biggie

Bigger Frame + Better Features = Badass Biggie

Transmission

Shimano 7 Speed

Fast, Accurate, Indexed Shifting Performance with the 7-speed 14-28T Shimano Derailleur, Cassette, and Shifter.

Motor

Locked at 500W | 750W | 1080W

Fatfish 48V 500W High Torque Rear Motor
Restricted to 500W by default. Unlocked 750W, and Peak Output of 1080W.

Derailleur

Shimano Tourney

The Shimano Tourney TY Long Cage Rear Derailleur Accommodates the Biggie's 14-28T Cassette To Deliver the Wide Range of Gears that Support the Multiple Riding Modes on this Ebike.

 

 

Battery

960Watts/ 20Ah

960 Watts, Samsung Cells. Superior Weatherproofing. Up to 200 km on a Single Charge in Eco Mode. Comes with a Battery Strap for Superior Safety.

Brakes

Kamros Hydraulic Disc Brakes

Kamros Hydraulic Disc Brakes, featuring Motor Safety Cut Off.

Sensor

Cadence

Dual Hall 24 Induction Magnets Cadence Sensor.

Suspension

60mm Front Fork

with 34mm Strong Stanchions and Knobs for Adjustment to use the Lockout Function

 

 

Warranty

3 Years

on Frame, Battery 2 years, Motor 2 years, and All Other Components 1 Year.

 

 

Charger

Input Voltage

48 Volt | Output 48v 2A

Speed

25km/hr

Capped at 25km/hr for Public Use

In the Box

Biggie

Battery Charger, 2 Keys for the Battery, Bottle Cage, Front & Rear Light, and MIK Ready Rear Rack. Built in Horn, operated by Control Panel. USB Charging Mode for Add On Accessories.

 

 

Range

200km

in Eco Mode, 40km in Power Mode.
Total 3 modes:
ECO- 0/1/2 Pedal Assist
NOR- 3/4 Pedal Assist
PWR: 5 Pedal Assist


 

Rear Rack

MIK Ready

Reinforced Rear Rack prefitted with the MIK Carrier Plate, ready for Attachin MIK Product Adaptor for easy cargo sliding on-off.  

 

 

Display

C900 LCD

Centre-Mounted C900 LCD Console, Charge Indicator, Speedometer, Odometer, Trip Odometer, Pedal Assist Level, Clock and more

 

 

Max Load

160 kg

This does Not include the Bike Weight. 160 Kg is the Total Carrying Capacity of the Biggie including Cargo.

 

 

Lights

LED

Headlight and Taillight with Turn Signals Powered by the Main Battery and Operated using the Control Panel positioned on the Handlebar.

Tyres

20 x 4.0"
Tyres & Rims

Puncture-Resistant Tyres and Strong Alloy BK One-Piece Rims, make the Biggie ideal for Commmuting & Adventures.

 

Frame

Alluminium Alloy

Lightweight yet Sturdy Frame for Longevity, Matte Black, Wide-Guards with Heavy Duty Stays (Front & Rear).

 

 

Cables

Marine Rated

Cables and Plugs on All Components for Simple and Quick Servicing and Replacement.

 

Handlebar

680mm wide

Alloy Handlebar, Positioned a tad bit Higher than the OG to offer more Control & Comfort to the Taller Riders.